After the centromeres separate during mitosis, the chromatids, now called _______, move toward opposite poles of the spindle.
A) centrosomes
B) kinetochores
C) half-spindles
D) sister chromosomes
E) daughter chromosomes

Question

Quizplus · Accepted Answer

After the centromeres separate, the chromatids are now independent daughter chromosomes and move toward opposite poles of the spindle. Choice A (centrosomes) are structures that organize the spindle fibers, but do not move during mitosis. Choice B (kinetochores) are part of the centromere that attaches the spindle fibers to the chromosome, but they do not move independently. Choice C (half-spindles) refers to the two sets of spindle fibers that extend from opposite poles, but not to the chromatids themselves. Choice D (sister chromosomes) refers to the two identical copies of a chromosome that are held together by the centromere until separation in anaphase, but they are not the actual term used for the separated chromatids.

After the Centromeres Separate During Mitosis, the Chromatids, Now Called